9/5:17/15+8/5:17/15
=27/17 + 24/17
=51/17=3
C1: \(\frac{9}{5}\div\frac{17}{15}+\frac{8}{5}\div\frac{17}{15}\)
\(=\frac{27}{17}+\frac{24}{17}\)
\(=3\)
C2: \(\frac{9}{5}\div\frac{17}{15}+\frac{8}{5}\div\frac{17}{15}\)
\(=\left(\frac{9}{5}+\frac{8}{5}\right)\div\frac{17}{15}\)
\(=\frac{17}{5}\div\frac{17}{15}\)
\(=3\)
C1 :9/5 :17/15 +8/5 :17/`5 C2 : ( 9/5 +8 /5 ) :17/15
=9/5*15/17 + 8/5 * 15/17 =17/5 :17/15
=9*15 /5*17 + 8* 15 / 5 *17 =3
27/17 + 24/17 =51/17 =3
mk trả lời đầu tiên đúng thì
